summaryrefslogtreecommitdiffstats
path: root/hw/acpi.c
blob: effc7ec23ebccb17ae782a656e76a1c2e792d7c9 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
/*
 * ACPI implementation
 *
 * Copyright (c) 2006 Fabrice Bellard
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License version 2 as published by the Free Software Foundation.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, see <http://www.gnu.org/licenses/>
 *
 * Contributions after 2012-01-13 are licensed under the terms of the
 * GNU GPL, version 2 or (at your option) any later version.
 */
#include "sysemu.h"
#include "hw.h"
#include "pc.h"
#include "acpi.h"

struct acpi_table_header {
    uint16_t _length;         /* our length, not actual part of the hdr */
                              /* XXX why we have 2 length fields here? */
    char sig[4];              /* ACPI signature (4 ASCII characters) */
    uint32_t length;          /* Length of table, in bytes, including header */
    uint8_t revision;         /* ACPI Specification minor version # */
    uint8_t checksum;         /* To make sum of entire table == 0 */
    char oem_id[6];           /* OEM identification */
    char oem_table_id[8];     /* OEM table identification */
    uint32_t oem_revision;    /* OEM revision number */
    char asl_compiler_id[4];  /* ASL compiler vendor ID */
    uint32_t asl_compiler_revision; /* ASL compiler revision number */
} QEMU_PACKED;

#define ACPI_TABLE_HDR_SIZE sizeof(struct acpi_table_header)
#define ACPI_TABLE_PFX_SIZE sizeof(uint16_t)  /* size of the extra prefix */

static const char dfl_hdr[ACPI_TABLE_HDR_SIZE] =
    "\0\0"                   /* fake _length (2) */
    "QEMU\0\0\0\0\1\0"       /* sig (4), len(4), revno (1), csum (1) */
    "QEMUQEQEMUQEMU\1\0\0\0" /* OEM id (6), table (8), revno (4) */
    "QEMU\1\0\0\0"           /* ASL compiler ID (4), version (4) */
    ;

char *acpi_tables;
size_t acpi_tables_len;

static int acpi_checksum(const uint8_t *data, int len)
{
    int sum, i;
    sum = 0;
    for (i = 0; i < len; i++) {
        sum += data[i];
    }
    return (-sum) & 0xff;
}

/* like strncpy() but zero-fills the tail of destination */
static void strzcpy(char *dst, const char *src, size_t size)
{
    size_t len = strlen(src);
    if (len >= size) {
        len = size;
    } else {
      memset(dst + len, 0, size - len);
    }
    memcpy(dst, src, len);
}

/* XXX fixme: this function uses obsolete argument parsing interface */
int acpi_table_add(const char *t)
{
    char buf[1024], *p, *f;
    unsigned long val;
    size_t len, start, allen;
    bool has_header;
    int changed;
    int r;
    struct acpi_table_header hdr;

    r = 0;
    r |= get_param_value(buf, sizeof(buf), "data", t) ? 1 : 0;
    r |= get_param_value(buf, sizeof(buf), "file", t) ? 2 : 0;
    switch (r) {
    case 0:
        buf[0] = '\0';
        /* fallthrough for default behavior */
    case 1:
        has_header = false;
        break;
    case 2:
        has_header = true;
        break;
    default:
        fprintf(stderr, "acpitable: both data and file are specified\n");
        return -1;
    }

    if (!acpi_tables) {
        allen = sizeof(uint16_t);
        acpi_tables = g_malloc0(allen);
    } else {
        allen = acpi_tables_len;
    }

    start = allen;
    acpi_tables = g_realloc(acpi_tables, start + ACPI_TABLE_HDR_SIZE);
    allen += has_header ? ACPI_TABLE_PFX_SIZE : ACPI_TABLE_HDR_SIZE;

    /* now read in the data files, reallocating buffer as needed */

    for (f = strtok(buf, ":"); f; f = strtok(NULL, ":")) {
        int fd = open(f, O_RDONLY);

        if (fd < 0) {
            fprintf(stderr, "can't open file %s: %s\n", f, strerror(errno));
            return -1;
        }

        for (;;) {
            char data[8192];
            r = read(fd, data, sizeof(data));
            if (r == 0) {
                break;
            } else if (r > 0) {
                acpi_tables = g_realloc(acpi_tables, allen + r);
                memcpy(acpi_tables + allen, data, r);
                allen += r;
            } else if (errno != EINTR) {
                fprintf(stderr, "can't read file %s: %s\n",
                        f, strerror(errno));
                close(fd);
                return -1;
            }
        }

        close(fd);
    }

    /* now fill in the header fields */

    f = acpi_tables + start;   /* start of the table */
    changed = 0;

    /* copy the header to temp place to align the fields */
    memcpy(&hdr, has_header ? f : dfl_hdr, ACPI_TABLE_HDR_SIZE);

    /* length of the table minus our prefix */
    len = allen - start - ACPI_TABLE_PFX_SIZE;

    hdr._length = cpu_to_le16(len);

    if (get_param_value(buf, sizeof(buf), "sig", t)) {
        strzcpy(hdr.sig, buf, sizeof(hdr.sig));
        ++changed;
    }

    /* length of the table including header, in bytes */
    if (has_header) {
        /* check if actual length is correct */
        val = le32_to_cpu(hdr.length);
        if (val != len) {
            fprintf(stderr,
                "warning: acpitable has wrong length,"
                " header says %lu, actual size %zu bytes\n",
                val, len);
            ++changed;
        }
    }
    /* we may avoid putting length here if has_header is true */
    hdr.length = cpu_to_le32(len);

    if (get_param_value(buf, sizeof(buf), "rev", t)) {
        val = strtoul(buf, &p, 0);
        if (val > 255 || *p) {
            fprintf(stderr, "acpitable: \"rev=%s\" is invalid\n", buf);
            return -1;
        }
        hdr.revision = (uint8_t)val;
        ++changed;
    }

    if (get_param_value(buf, sizeof(buf), "oem_id", t)) {
        strzcpy(hdr.oem_id, buf, sizeof(hdr.oem_id));
        ++changed;
    }

    if (get_param_value(buf, sizeof(buf), "oem_table_id", t)) {
        strzcpy(hdr.oem_table_id, buf, sizeof(hdr.oem_table_id));
        ++changed;
    }

    if (get_param_value(buf, sizeof(buf), "oem_rev", t)) {
        val = strtol(buf, &p, 0);
        if (*p) {
            fprintf(stderr, "acpitable: \"oem_rev=%s\" is invalid\n", buf);
            return -1;
        }
        hdr.oem_revision = cpu_to_le32(val);
        ++changed;
    }

    if (get_param_value(buf, sizeof(buf), "asl_compiler_id", t)) {
        strzcpy(hdr.asl_compiler_id, buf, sizeof(hdr.asl_compiler_id));
        ++changed;
    }

    if (get_param_value(buf, sizeof(buf), "asl_compiler_rev", t)) {
        val = strtol(buf, &p, 0);
        if (*p) {
            fprintf(stderr, "acpitable: \"%s=%s\" is invalid\n",
                    "asl_compiler_rev", buf);
            return -1;
        }
        hdr.asl_compiler_revision = cpu_to_le32(val);
        ++changed;
    }

    if (!has_header && !changed) {
        fprintf(stderr, "warning: acpitable: no table headers are specified\n");
    }


    /* now calculate checksum of the table, complete with the header */
    /* we may as well leave checksum intact if has_header is true */
    /* alternatively there may be a way to set cksum to a given value */
    hdr.checksum = 0;    /* for checksum calculation */

    /* put header back */
    memcpy(f, &hdr, sizeof(hdr));

    if (changed || !has_header || 1) {
        ((struct acpi_table_header *)f)->checksum =
            acpi_checksum((uint8_t *)f + ACPI_TABLE_PFX_SIZE, len);
    }

    /* increase number of tables */
    (*(uint16_t *)acpi_tables) =
        cpu_to_le32(le32_to_cpu(*(uint16_t *)acpi_tables) + 1);

    acpi_tables_len = allen;
    return 0;

}

static void acpi_notify_wakeup(Notifier *notifier, void *data)
{
    ACPIREGS *ar = container_of(notifier, ACPIREGS, wakeup);
    WakeupReason *reason = data;

    switch (*reason) {
    case QEMU_WAKEUP_REASON_RTC:
        ar->pm1.evt.sts |=
            (ACPI_BITMASK_WAKE_STATUS | ACPI_BITMASK_RT_CLOCK_STATUS);
        break;
    case QEMU_WAKEUP_REASON_PMTIMER:
        ar->pm1.evt.sts |=
            (ACPI_BITMASK_WAKE_STATUS | ACPI_BITMASK_TIMER_STATUS);
        break;
    case QEMU_WAKEUP_REASON_OTHER:
    default:
        /* ACPI_BITMASK_WAKE_STATUS should be set on resume.
           Pretend that resume was caused by power button */
        ar->pm1.evt.sts |=
            (ACPI_BITMASK_WAKE_STATUS | ACPI_BITMASK_POWER_BUTTON_STATUS);
        break;
    }
}

/* ACPI PM1a EVT */
uint16_t acpi_pm1_evt_get_sts(ACPIREGS *ar)
{
    int64_t d = acpi_pm_tmr_get_clock();
    if (d >= ar->tmr.overflow_time) {
        ar->pm1.evt.sts |= ACPI_BITMASK_TIMER_STATUS;
    }
    return ar->pm1.evt.sts;
}

void acpi_pm1_evt_write_sts(ACPIREGS *ar, uint16_t val)
{
    uint16_t pm1_sts = acpi_pm1_evt_get_sts(ar);
    if (pm1_sts & val & ACPI_BITMASK_TIMER_STATUS) {
        /* if TMRSTS is reset, then compute the new overflow time */
        acpi_pm_tmr_calc_overflow_time(ar);
    }
    ar->pm1.evt.sts &= ~val;
}

void acpi_pm1_evt_write_en(ACPIREGS *ar, uint16_t val)
{
    ar->pm1.evt.en = val;
    qemu_system_wakeup_enable(QEMU_WAKEUP_REASON_RTC,
                              val & ACPI_BITMASK_RT_CLOCK_ENABLE);
    qemu_system_wakeup_enable(QEMU_WAKEUP_REASON_PMTIMER,
                              val & ACPI_BITMASK_TIMER_ENABLE);
}

void acpi_pm1_evt_power_down(ACPIREGS *ar)
{
    if (ar->pm1.evt.en & ACPI_BITMASK_POWER_BUTTON_ENABLE) {
        ar->pm1.evt.sts |= ACPI_BITMASK_POWER_BUTTON_STATUS;
        ar->tmr.update_sci(ar);
    }
}

void acpi_pm1_evt_reset(ACPIREGS *ar)
{
    ar->pm1.evt.sts = 0;
    ar->pm1.evt.en = 0;
    qemu_system_wakeup_enable(QEMU_WAKEUP_REASON_RTC, 0);
    qemu_system_wakeup_enable(QEMU_WAKEUP_REASON_PMTIMER, 0);
}

/* ACPI PM_TMR */
void acpi_pm_tmr_update(ACPIREGS *ar, bool enable)
{
    int64_t expire_time;

    /* schedule a timer interruption if needed */
    if (enable) {
        expire_time = muldiv64(ar->tmr.overflow_time, get_ticks_per_sec(),
                               PM_TIMER_FREQUENCY);
        qemu_mod_timer(ar->tmr.timer, expire_time);
    } else {
        qemu_del_timer(ar->tmr.timer);
    }
}

void acpi_pm_tmr_calc_overflow_time(ACPIREGS *ar)
{
    int64_t d = acpi_pm_tmr_get_clock();
    ar->tmr.overflow_time = (d + 0x800000LL) & ~0x7fffffLL;
}

uint32_t acpi_pm_tmr_get(ACPIREGS *ar)
{
    uint32_t d = acpi_pm_tmr_get_clock();
    return d & 0xffffff;
}

static void acpi_pm_tmr_timer(void *opaque)
{
    ACPIREGS *ar = opaque;
    qemu_system_wakeup_request(QEMU_WAKEUP_REASON_PMTIMER);
    ar->tmr.update_sci(ar);
}

void acpi_pm_tmr_init(ACPIREGS *ar, acpi_update_sci_fn update_sci)
{
    ar->tmr.update_sci = update_sci;
    ar->tmr.timer = qemu_new_timer_ns(vm_clock, acpi_pm_tmr_timer, ar);
}

void acpi_pm_tmr_reset(ACPIREGS *ar)
{
    ar->tmr.overflow_time = 0;
    qemu_del_timer(ar->tmr.timer);
}

/* ACPI PM1aCNT */
void acpi_pm1_cnt_init(ACPIREGS *ar)
{
    ar->wakeup.notify = acpi_notify_wakeup;
    qemu_register_wakeup_notifier(&ar->wakeup);
}

void acpi_pm1_cnt_write(ACPIREGS *ar, uint16_t val, char s4)
{
    ar->pm1.cnt.cnt = val & ~(ACPI_BITMASK_SLEEP_ENABLE);

    if (val & ACPI_BITMASK_SLEEP_ENABLE) {
        /* change suspend type */
        uint16_t sus_typ = (val >> 10) & 7;
        switch(sus_typ) {
        case 0: /* soft power off */
            qemu_system_shutdown_request();
            break;
        case 1:
            qemu_system_suspend_request();
            break;
        default:
            if (sus_typ == s4) { /* S4 request */
                qemu_system_shutdown_request();
            }
            break;
        }
    }
}

void acpi_pm1_cnt_update(ACPIREGS *ar,
                         bool sci_enable, bool sci_disable)
{
    /* ACPI specs 3.0, 4.7.2.5 */
    if (sci_enable) {
        ar->pm1.cnt.cnt |= ACPI_BITMASK_SCI_ENABLE;
    } else if (sci_disable) {
        ar->pm1.cnt.cnt &= ~ACPI_BITMASK_SCI_ENABLE;
    }
}

void acpi_pm1_cnt_reset(ACPIREGS *ar)
{
    ar->pm1.cnt.cnt = 0;
}

/* ACPI GPE */
void acpi_gpe_init(ACPIREGS *ar, uint8_t len)
{
    ar->gpe.len = len;
    ar->gpe.sts = g_malloc0(len / 2);
    ar->gpe.en = g_malloc0(len / 2);
}

void acpi_gpe_blk(ACPIREGS *ar, uint32_t blk)
{
    ar->gpe.blk = blk;
}

void acpi_gpe_reset(ACPIREGS *ar)
{
    memset(ar->gpe.sts, 0, ar->gpe.len / 2);
    memset(ar->gpe.en, 0, ar->gpe.len / 2);
}

static uint8_t *acpi_gpe_ioport_get_ptr(ACPIREGS *ar, uint32_t addr)
{
    uint8_t *cur = NULL;

    if (addr < ar->gpe.len / 2) {
        cur = ar->gpe.sts + addr;
    } else if (addr < ar->gpe.len) {
        cur = ar->gpe.en + addr - ar->gpe.len / 2;
    } else {
        abort();
    }

    return cur;
}

void acpi_gpe_ioport_writeb(ACPIREGS *ar, uint32_t addr, uint32_t val)
{
    uint8_t *cur;

    addr -= ar->gpe.blk;
    cur = acpi_gpe_ioport_get_ptr(ar, addr);
    if (addr < ar->gpe.len / 2) {
        /* GPE_STS */
        *cur = (*cur) & ~val;
    } else if (addr < ar->gpe.len) {
        /* GPE_EN */
        *cur = val;
    } else {
        abort();
    }
}

uint32_t acpi_gpe_ioport_readb(ACPIREGS *ar, uint32_t addr)
{
    uint8_t *cur;
    uint32_t val;

    addr -= ar->gpe.blk;
    cur = acpi_gpe_ioport_get_ptr(ar, addr);
    val = 0;
    if (cur != NULL) {
        val = *cur;
    }

    return val;
}
OpenPOWER on IntegriCloud